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DE-102024132737-A1 - Radial piston compressor, and methods for assembling a radial piston compressor

DE102024132737A1DE 102024132737 A1DE102024132737 A1DE 102024132737A1DE-102024132737-A1

Abstract

The present invention relates to a radial piston compressor comprising a compressor unit (1) and a drive unit (2) for driving the compressor unit, wherein the compressor unit (1) comprises at least one, preferably a plurality of piston-working chamber assemblies (131, 132) arranged radially to an eccentric shaft (11, 12), wherein the eccentric shaft (11, 12) is driven by the drive unit (2), wherein each piston-working chamber assembly (131, 132) comprises a working chamber (131) and a piston (132) displaceable in the working chamber, wherein the working chamber (131) is equipped at its head end with an inlet valve cover (15) with an inlet valve (24), wherein the inlet valve (24) comprises an inlet channel (241), and wherein the inlet valve (24) comprises a valve plate (242) with a valve tongue (243) which is configured to is to selectively open or close the inlet channel (241) in the inlet valve cover (15), wherein the working chamber (131) is equipped with an outlet valve (25) with an outlet channel (251), wherein the valve plate (242') is equipped with at least one positive locking element (2422) which engages in the outlet channel (251) to determine the angular position of the valve plate (242'). The invention further relates to a method for assembling a radial piston compressor according to the invention, wherein the radial piston compressor comprises a cylinder housing (16) in which the working chamber (131) of the at least one piston-working chamber assembly (13) is received, wherein the working chamber (131) is equipped with a receptacle (18) for the inlet valve cover (15) and the valve plate (242), wherein the valve plate (242') is first inserted obliquely through the receptacle (18) with the at least one positive locking element (2422).

Inventors

  • Ulf Müller

Assignees

  • THYSSENKRUPP AG
  • THYSSENKRUPP DYNAMIC COMPONENTS GMBH

Dates

Publication Date
20260513
Application Date
20241108

Claims (8)

  1. A radial piston compressor comprising a compressor unit (1) and a drive unit (2) for driving the compressor unit, wherein the compressor unit (1) comprises at least one, preferably a plurality of piston-working chamber assemblies (131, 132) arranged radially to an eccentric shaft (11, 12), wherein the eccentric shaft (11, 12) is driven by the drive unit (2), wherein each piston-working chamber assembly (131, 132) comprises a working chamber (131) and a piston (132) displaceable in the working chamber, wherein the working chamber (131) is equipped at its head end with an inlet valve cover (15) with an inlet valve (24), wherein the inlet valve (24) comprises an inlet port (241), and wherein the inlet valve (24) comprises a valve plate (242) with a valve tongue (243), which is designed to is arranged to selectively open or close the inlet channel (241) in the inlet valve cover (15), wherein - the working chamber (131) is equipped with an outlet valve (25) with an outlet channel (251), characterized in that the valve plate (242') is equipped with at least one positive locking element (2422) which engages in the outlet channel (251) to determine the angular position of the valve plate (242').
  2. radial piston compressor according to Claim 1 , characterized in that the positive locking element (2422) is designed as a web, in particular as a web (2422) projecting beyond the diameter of the valve plate (242').
  3. Radial piston compressor according to at least one of the preceding claims, characterized in that the valve plate (242') is equipped with two positive locking elements (2422), in particular two webs, which each bear against the sides of the outlet channel (251).
  4. Radial piston compressor according to at least one of the preceding claims, characterized in that the inlet valve (24) comprises an inlet channel (241), wherein the inlet channel opens off-center into the working chamber (131).
  5. Radial piston compressor according to at least one of the preceding claims, characterized in that a recess (153) is provided in the inlet valve cover (15) in the area of the outlet channel (251).
  6. Radial piston compressor according to at least one of the preceding claims, characterized in that the inlet valve cover (15) is equipped with bores (154) for engagement of a tool during the assembly process.
  7. Method for assembling a radial piston compressor according to at least one of the preceding claims, wherein the radial piston compressor comprises a cylinder housing (16) in which the working chamber (131) of the at least one piston-working chamber assembly (13) is received, wherein the working chamber (131) is equipped with a receptacle (18) for the inlet valve cover (15) and the valve plate (242), characterized in that the valve plate (242') is inserted obliquely through the receptacle (18) with the at least one positive locking element (2422) first into the receptacle (18).
  8. Procedure according to Claim 7 , characterized in that a tool is used for the angular orientation of the inlet valve cover (15) to the cylinder housing (16), which can engage in bores (154) of the inlet valve cover (15) during the assembly process, thereby ensuring the angular orientation of the inlet valve cover (15) to the cylinder housing (16) and thus also to the inlet valve plate (242') during the assembly process.

Description

The present invention relates to a radial piston compressor according to the preamble of claim 1, and to a method for assembling a radial piston compressor according to the preamble of claim 7. A radial piston compressor is a fluid power component. In contrast to an axial piston compressor, in this type of compressor at least one piston-working chamber assembly is arranged radially and perpendicular to the drive shaft. A radial piston compressor can also be referred to as a compressor based on the radial piston principle. The piston's conveying or reciprocating motion is usually generated by an eccentric. Therefore, the drive shaft with the eccentric can also be referred to as an eccentric shaft. A radial piston compressor typically comprises several piston-working chamber assemblies that extend radially from the eccentric shaft in a star-shaped pattern. A piston-work chamber assembly essentially comprises a working chamber, also called a cylinder, and a piston that moves up and down within the working chamber. The piston has a central geometric axis that coincides with the piston's direction of movement. In a radial piston compressor with an eccentric shaft, the piston has a contact point on its side facing the eccentric shaft, against which the eccentric disk strikes or rests during the rotation of the eccentric shaft. The eccentric shaft has an axis of rotation around which it rotates. When the eccentric disk strikes the piston or a transmission element, it causes the piston to move upwards, compressing the medium in the working chamber. Radial piston compressors are used, for example, to compress refrigerant in the air conditioning systems of motor vehicles, especially in electric vehicles. The working fluid to be compressed could be, for example, a refrigerant such as CO2. However, other media or refrigerants are also conceivable. A radial piston compressor of the aforementioned type is, for example, made from the DE 10 2020 211 680 A1 or DE 10 2022 133 723 A1 became known. A radial piston compressor of the aforementioned type is also made from the DE 10 2021 204 713 A1 This has become known. In particular, an inlet valve cover is described here as a seal between the working chamber and the cylinder housing of a radial piston compressor. The inlet valve cover is mounted in a recess in the cylinder housing. The retaining ring, which makes contact with all seven intake valve covers, holds all intake valve covers against the cylinder block. This retaining ring prevents the intake valve covers from lifting off the cylinder block. To ensure a seal between the intake valve cover and the cylinder block, an O-ring, for example, acts as a sealing element between the intake valve cover and its receptacle. The housing retaining ring makes contact with all intake valve covers and holds them against the cylinder block. The intake valve cover is equipped with an intake valve comprising an intake port in the intake valve cover and a valve plate. The valve plate includes a valve tongue which is arranged on the valve plate via bending beams. The valve tongue is configured to selectively close or open the intake port. The valve plate is positioned between a shoulder of the receptacle and the intake valve cover. The radial piston compressor also has an exhaust valve, which includes an exhaust port. Like the intake port, the exhaust port opens into the working chamber, but it is usually arranged radially to the working chamber, while the intake port is arranged axially with respect to the working chamber. Since the intake port for the intake valve is located off-center to the center of the intake valve cover, it is necessary to insert the valve plate with the valve tongue, which optionally closes or opens the intake port, into the receptacle at an angle to the intake valve cover. For this purpose, for example a pin-bore connection can be provided as an anti-rotation device, i.e. a fitting bore in the receptacle and a fitting bore in the intake valve cover, into which a cylindrical pin is inserted when the intake valve cover is mounted. The receptacle, particularly its shoulder, has a locating bore into which the pin is inserted, protruding beyond the shoulder's surface. The circular valve plate is then placed into the receptacle so that a locating bore in the valve plate aligns with the pin, or rather, the pin positions the plate at an angle within the receptacle. [The text abruptly ends here, so the translation stops as well.] The intake valve cover, once mounted, has an additional locating bore into which the protruding pin engages in the final assembly state. Since the pin protrusion cannot be defined in such a way that it only aligns the valve plate (with a sheet thickness of, for example, 0.3 mm), a locating bore must also be provided in the intake valve cover into which the pin engages. A locking mechanism to prevent the valve plate from rotating relative to the intake valve cover is necessary because the intake por